CN107219128B - Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement - Google Patents
Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement Download PDFInfo
- Publication number
- CN107219128B CN107219128B CN201710572015.9A CN201710572015A CN107219128B CN 107219128 B CN107219128 B CN 107219128B CN 201710572015 A CN201710572015 A CN 201710572015A CN 107219128 B CN107219128 B CN 107219128B
- Authority
- CN
- China
- Prior art keywords
- rock stratum
- transverse
- simulation
- jacks
- longitudinal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000009826 distribution Methods 0.000 title claims abstract description 28
- 230000009471 action Effects 0.000 title claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 199
- 238000004088 simulation Methods 0.000 claims abstract description 63
- 238000012360 testing method Methods 0.000 claims abstract description 43
- 238000005094 computer simulation Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 74
- 238000003825 pressing Methods 0.000 claims description 69
- 229910000831 Steel Inorganic materials 0.000 claims description 29
- 239000010959 steel Substances 0.000 claims description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 239000006004 Quartz sand Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 9
- 239000004927 clay Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 9
- 229910052602 gypsum Inorganic materials 0.000 claims description 9
- 239000010440 gypsum Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000010008 shearing Methods 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 description 15
- 238000011161 development Methods 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 201000004569 Blindness Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The coal measure stratum stress distribution simulation device under the action of multi-period tectonic movement comprises a rock stratum simulation and fixing system, a tectonic dynamic simulation system, a tectonic deformation control system, a pressurization system and an information acquisition test and analysis system; the rock stratum simulation and fixing system is internally provided with a plurality of rock strata, the structure dynamic simulation system applies longitudinal force and transverse force to the rock strata, the structure deformation control system is used for controlling the deformation of the rock strata to enable the rock strata to reach an expected structure form, and the pressurization system adopts a hydraulic system to provide power for the structure dynamic simulation system and the structure deformation control system. The invention also discloses a simulation method of the coal measure stratum stress distribution simulation device under the action of the multi-stage structure movement. The method simulates the crustal stress distribution characteristics and the evolution process of the coal measure strata under the action of superposition of two-stage tectonic movement, and provides scientific basis for stress distribution prediction of the coal measure strata at different tectonic positions; the invention can simulate the stress of different structural parts above and below the fold middle and the fold middle.
Description
Technical Field
The invention belongs to the technical field of coal-based gas development simulation tests, and particularly relates to a coal-based stratum stress distribution simulation device and method under the action of multi-stage structure motion.
Background
Along with the increase of the exploitation depth of the coal bed gas, the heat of exploration and development of the coal-based gas gradually rises, however, after the coal-based strata in China are formed, the coal-based strata mostly experience the action of multi-stage structure movement, the superposition of the multi-stage structure movement leads the small-range internal stress distribution to be complicated, and the complexity of stress conditions restricts the accuracy and effectiveness of the projects such as permeability prediction, drilling, fracturing, discharging and mining in the coal-based gas exploration and development. Therefore, accurate prediction of the geostress is an important task for the exploration and development of coal-based gas.
In order to obtain the stress distribution characteristics of coal-bed formations buried deep in the underground kilometers or even more, coalbed methane workers in China do a great deal of work by means of geological exploration, mathematical calculation and the like. Some researchers adopt mechanical simulation software to carry out stress simulation to obtain a stress distribution rule, and the simulation result is relatively accurate in areas with relatively simple geological conditions. When geological conditions are complex, due to the fact that the process cannot be tracked, the assumed conditions are too ideal, and the simulation result is greatly different from the actual simulation result; some researchers use strain gauge measurements to measure the ground stress, but more point data, distribution rules and influence factors can not give more definite answers. Some researchers adopt methods such as hydraulic fracturing method and well logging to calculate the ground stress, more data are point data, the fine degree of exploration and development determines the understanding degree of the ground stress distribution of a development area to a great extent, and the development guidance is very passive. After different coal measure stratum conditions are subjected to different periods and different size structure movement effects, the stress of different structure parts under different forms of fold structures is formed, the influence factors are different, the evolution characteristics of the stress in the structure power action process are different, and the problems are not very clear answers so far, so that the blindness of the current coal measure gas development is large. Therefore, it is necessary to develop a simulation device capable of simulating different coal-based stratum conditions and monitoring the stress magnitude under the action of different periods of tectonic movement, so as to lay a foundation for predicting the permeability of different tectonic parts of the coal-based stratum after the action of multi-period tectonic movement.
Disclosure of Invention
The invention provides a device and a method for simulating stress distribution of a coal measure stratum under the action of multi-stage tectonic movement, aiming at the problem that the stress distribution characteristics of different layers and different tectonic positions cannot be accurately predicted after the coal measure stratum is subjected to the action of multi-stage tectonic movement, wherein the device and the method can simulate the horizontal stress of different rock stratums and different tectonic positions in the coal measure stratum after the action of superposition of two-stage tectonic movement and can also simulate the evolution process of the coal measure stratum; the stress distribution and evolution characteristics of different structural parts of the coal measure stratum under the conditions of being in the fold and above the surface and under the condition of being below the surface can be simulated. Through the simulation test, a test basis can be provided for structural stress distribution research of the coal measure stratum under the action of multi-stage structural power.
In order to solve the technical problems, the invention adopts the following technical scheme: a coal measure stratum stress distribution simulation device and method under the action of multi-period tectonic movement comprise a rock stratum simulation and fixing system, a tectonic dynamic simulation system, a tectonic deformation control system, a pressurization system and an information acquisition test and analysis system;
the rock stratum simulation and fixing system is internally provided with and fixed with a plurality of rock strata, the longitudinal direction of the rock stratum is assumed to be the front-back direction, the transverse direction is assumed to be the left-right direction, the structural power simulation system is arranged around the rock stratum and applies longitudinal force and transverse force to the rock stratum, the structural deformation control system is arranged at the top and the bottom in the rock stratum simulation and fixing system and is used for controlling the deformation of the rock stratum to enable the rock stratum to reach an expected structural form, and the pressurizing system adopts a hydraulic system to provide power for the structural power simulation system and the structural deformation control system; the information acquisition, test and analysis system comprises a transverse stress sensor, a longitudinal stress sensor, a high-definition camera, a data acquisition circuit and a computer, wherein the transverse stress sensor and the longitudinal stress sensor are arranged on the longitudinal and transverse surfaces of the rock stratum, the high-definition camera is arranged in the rock stratum simulation and fixing system and used for shooting the deformation change of the simulated rock stratum in the whole loading process in real time, and the high-definition camera, the transverse stress sensor and the longitudinal stress sensor are connected with the computer through the data acquisition circuit.
The rock stratum simulation and fixing system comprises a fixed box body, a fixed support and a movable pressing seat, wherein the fixed support is rotatably connected to the inner rear side of the fixed box body through a pin shaft arranged along the left and right horizontal directions;
the rear side of the movable pressing seat is provided with a movable square groove corresponding to the front and the rear of the fixed square groove, the left side wall and the right side wall in the fixed box body are provided with guide grooves along the front and rear directions, two sides of the movable pressing seat are provided with guide pillars which extend into and slide along the guide grooves in the front and rear directions, and the front side of the movable pressing seat is provided with a movable jacking groove with an arc-shaped section along the left and right horizontal directions;
the rock stratum comprises a regulating rock stratum and a plurality of testing rock strata which are arranged from top to bottom, the front end parts of the regulating rock stratum and the testing rock stratum are placed in the movable square groove, and the rear end parts of the regulating rock stratum and the testing rock stratum are placed in the fixed square groove.
The structure power simulation system comprises a transverse power simulation mechanism and a longitudinal power simulation mechanism; the transverse dynamic simulation mechanisms are at least provided with three groups along the front and back directions of the rock stratum,
each group of transverse power simulation mechanisms comprises a cushion block, two left pressing plates, two right pressing plates, a pulling plate, four prestressed steel strands and a transverse oil cylinder, wherein the left side of the transverse oil cylinder is fixed on the right side of a fixed box body, the right end of a piston rod of the transverse oil cylinder is fixedly connected with the left side surface of the pulling plate, the cushion block is arranged between the right sides of the two right pressing plates and the right side wall of the fixed box body, the two left pressing plates are arranged on the left side of a rock stratum and are arranged at intervals from front to back, the left ends of the two prestressed steel strands on the front side are respectively anchored with the upper part and the lower part of one left pressing plate on the front side, the right ends of the two prestressed steel strands on the front side are anchored with the upper part and the lower part of the front side of the pulling plate after penetrating through the two right pressing plates and the right side wall of the fixed box body, the left ends of the two prestressed steel strands on the rear side are respectively anchored with the upper part and the lower part of the left pressing plate on the rear side of the fixed box body after penetrating through the cushion block and the right side wall of the fixed box body;
the longitudinal power simulation mechanism comprises a longitudinal oil cylinder and a driving rod which are arranged in the fixed box body, the rear side of the longitudinal oil cylinder is fixedly connected to the inner wall of the front side of the fixed box body, the driving rod is arranged in the left-right horizontal direction, the rear end of a piston rod of the longitudinal oil cylinder is fixedly connected with the middle of the driving rod, and the rear side of the driving rod is jacked in a movable jacking groove in the front side of the movable pressure seat.
The structural deformation control system comprises two front jacks, six middle jacks and two rear jacks, wherein the two front jacks are respectively fixed on the top inner wall and the bottom inner wall of the front side of the fixed box body, and are respectively positioned above and below the rock stratum and are arranged correspondingly up and down; the three middle jacks are fixed on the middle top inner wall of the fixed box body at intervals in the left-right direction, the other three middle jacks are fixed on the middle bottom inner wall of the fixed box body at intervals in the left-right direction, the three middle jacks on the upper portion and the three middle jacks on the lower portion are respectively located above and below the rock stratum and are in up-down one-to-one correspondence, the two rear jacks are respectively fixed on the top inner wall and the bottom inner wall of the rear side of the fixed box body, and the two rear jacks are respectively located above and below the rock stratum and are in up-down corresponding arrangement.
The pressurization system comprises a hydraulic control device, a hydraulic pump, a hydraulic oil tank and a hydraulic flow divider, wherein an inlet of the hydraulic pump is communicated with the hydraulic oil tank through a first high-pressure oil pipe, an outlet of the hydraulic pump is communicated with an inlet of the hydraulic flow divider through a second high-pressure oil pipe, three outlets are arranged on the hydraulic flow divider, one outlet of the hydraulic flow divider is connected with the longitudinal oil cylinder through a third high-pressure oil pipe, a second outlet of the hydraulic flow divider is connected with the transverse oil cylinder through a fourth high-pressure oil pipe, a third outlet of the hydraulic flow divider is respectively connected with two front jacks, six middle jacks and two rear jacks through a fifth high-pressure oil pipe, electronic valves and pressure gauges are arranged on the third high-pressure oil pipe, the fourth high-pressure oil pipe and the fifth high-pressure oil pipe, and the first hydraulic control device is respectively connected with the hydraulic pump, all the electronic valves and the pressure gauges through control lines.
The simulation method of the coal measure stratum stress distribution simulation device under the action of the multi-stage structure movement comprises the following steps:
(1) Preparation of simulated rock formation and embedding of sensor
Firstly, calculating Young modulus and thickness required by each testing rock stratum and adjusting the rock stratum according to simulated rock stratum parameters, wherein the testing rock stratum is mainly used for simulating three coal-based strata with different lithology, the number of layers can be increased or decreased according to needs, and the testing rock stratum is formed by mixing cement, gypsum powder, quartz sand, clay and water according to different proportions and then laying the mixture layer by layer; the rock stratum is mainly used for controlling the position of the dough surface in the folds and is also formed by paving cement, gypsum powder, quartz sand, clay and water after being mixed according to different proportions, and the Young modulus and the paving thickness of the rock stratum meet the requirements
When the rock is in the adjusting stratum, the fold middle surface and the fold middle surface are always positioned in the adjusting stratum; in the formula>
And &>
For adjusting the Young's modulus and the thickness of the rock formation, < >>
And average young's modulus and total thickness of the test rock formation, respectively;
then manufacturing a pouring mold according to the calculated size of the simulated rock stratum; preparing four mixtures with different expected strengths by using cement, gypsum powder, quartz sand, clay and water according to a certain proportion for later use; when pouring, firstly, pouring an adjusting rock stratum at the bottom of the mold, after the adjusting rock stratum is slightly solidified, sequentially pouring three layers of test rock strata in sequence, simultaneously embedding a longitudinal stress sensor and a transverse stress sensor, leading out a data acquisition circuit to be connected with a computer, placing the simulated rock stratum in a shade place, curing to the designed strength, and dismantling the mold;
(2) Installation of simulated rock formation and connection of pressurized system
The fixed support and the movable pressing seat are respectively arranged on the rear side and the front side in the fixed box body according to design, the pin shaft is rotatably connected to the left side wall and the right side wall of the fixed box body, and meanwhile, a supporting column arranged on the inner rear side wall of the fixed box body is in pressure contact with the top of the fixed supporting groove; the guide posts on the two sides of the movable pressing seat extend into and are arranged in the guide grooves in a sliding mode, the prefabricated rock stratum is placed in the fixed square groove of the fixed support and the movable square groove of the movable pressing seat, the pressurizing system and the information acquisition testing and analyzing system are installed and connected, and the transverse stress sensor and the longitudinal stress sensor are arranged in the tested rock stratum; debugging lines, oil paths and oil pumps to ensure that all oil cylinders and jacks work normally;
(3) And mounting of the structural dynamic simulation system
Placing two left pressing plates on the left side of the simulated rock stratum, placing two right pressing plates on the right side of the simulated rock stratum, penetrating the prestressed steel strand through the left pressing plates and anchoring the prestressed steel strand with the left pressing plates, fixing the pulling plate on a piston rod of a transverse oil cylinder, penetrating the right end of the prestressed steel strand through the pulling plate and anchoring, and placing a cushion block between the right sides of the two right pressing plates and the right side wall of the fixed box body;
(4) Setting transverse predeformation on the rock stratum
In order to ensure that the required structural form can be well simulated in the experiment, firstly, the deformation control jack set is used for carrying out transverse deformation presetting, namely, firstly, a hydraulic control device is operated to enable a hydraulic pump to work, two front jacks, two rear jacks and two middle jacks positioned in the middle in the front and rear direction simultaneously load the middle part of a simulated rock stratum so as to achieve the purpose of limiting the vertical displacement of the middle part of the rock stratum, and then the two middle jacks positioned on the left side in the front and rear direction and the two middle jacks on the right side are started to apply pressure to the rock stratum so as to enable the rock stratum to form a fold shape in the transverse direction;
(5) Lateral structural dynamic simulation
Simultaneously starting three transverse oil cylinders through a hydraulic control device to carry out tensioning loading on the prestressed steel strands, unloading all jacks in the step (4), acquiring change data of transverse stress through a transverse stress sensor while tensioning, observing that flexure deformation reaches design requirements according to a preset structural form in the step (4) through a camera image, stopping tensioning, anchoring the prestressed steel strands on the right side of a right pressing plate to enable a simulation rock stratum to keep a current stress and deformation state, unloading the transverse oil cylinders, removing cushion blocks, shearing redundant prestressed steel strands, and storing stress change data and video data;
(6) Longitudinal structural dynamic simulation
The method comprises the following steps that a longitudinal oil cylinder is started through a hydraulic control device to directly load a simulated rock stratum subjected to transverse construction power, the longitudinal oil cylinder drives a movable pressing seat to move backwards through a driving rod to press the rock stratum, two ends of a fixed support are rotatably connected into a fixed box body through a pin shaft, so that the rock stratum is more easily simulated in the longitudinal construction power loading to form a flexure structure, longitudinal and transverse stress and flexure deformation changes are collected through a longitudinal stress sensor and a transverse stress sensor during longitudinal loading, the deformation process of the simulated rock stratum is recorded through a camera, loading is continued until the rock stratum is broken, and stress and deformation change data and video data are stored;
(7) Unloading each device and equipment after the experiment is finished;
(8) Pouring the simulated rock stratum between the test rock stratums by using a pouring mould to perform the simulation process of the steps;
(9) And (4) casting the simulated rock stratum with the adjusting rock stratum at the topmost part of the test rock stratum by using the casting mold, and performing the simulation process of the steps.
By adopting the technical scheme, the invention has the following technical effects:
1. the method can simulate the ground stress distribution characteristics of the coal measure strata and the evolution process thereof under the action of superposition of two-stage tectonic movement, and provides scientific basis for the stress distribution prediction of the coal measure strata at different tectonic positions;
2. the invention can simulate the stress of different structural parts above and below the fold middle and the fold middle.
3. The transverse construction power loading adopts the common prestress technology in bridge construction, and the design can ensure that the deformation of the simulated rock stratum in the longitudinal loading process is not influenced by the transverse oil cylinder, namely the transverse oil cylinder is liberated in the longitudinal loading process, so that the simulated rock stratum is closer to the real deformation condition.
4. The rock stratum simulation and fixing system is mainly used for simulating real coal measure strata and surrounding rocks; constructing a dynamic simulation system which mainly simulates the action process of transverse and longitudinal stress on the rock stratum; the formation deformation control system is mainly used for controlling the deformation of the rock stratum to enable the rock stratum to reach a desired formation shape; the pressurizing system mainly provides hydraulic power for all hydraulic machines in the device; the information acquisition, test and analysis system mainly collects and analyzes data.
5. In the longitudinal structure dynamic simulation process, the fixed support is subjected to backward thrust of a rock stratum to rotate by taking the pin shaft as a central line, and the support column plays a role in supporting the fixed support. Similarly, the guide posts on the left side and the right side of the movable pressing seat move along the guide groove, when the driving rod presses the movable pressing groove to drive the movable pressing seat to push the rock stratum, the movable pressing seat can also rotate for a certain angle by taking the guide posts as central lines, but the guide posts can still move back and forth in the guide groove.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
fig. 3 is a sectional view B-B of fig. 1.
Detailed Description
As shown in fig. 1, 2 and 3, the coal measure formation stress distribution simulation device under the action of the multi-stage tectonic movement comprises a rock stratum simulation and fixing system, a tectonic dynamic simulation system, a tectonic deformation control system, a pressurization system and an information acquisition, test and analysis system;
a plurality of rock strata 1 are arranged and fixed in the rock stratum simulation and fixing system, a structural dynamic simulation system is arranged around the rock strata 1 and applies longitudinal force and transverse force to the rock strata 1 on the assumption that the longitudinal direction of the rock strata 1 is the front-back direction and the transverse direction is the left-right direction, a structural deformation control system is arranged at the top and the bottom in the rock stratum simulation and fixing system and is used for controlling the deformation of the rock strata 1 so that the rock strata 1 can reach an expected structural form, and a pressurizing system adopts a hydraulic system to provide power for the structural dynamic simulation system and the structural deformation control system; the information acquisition, test and analysis system comprises a transverse stress sensor 2, a longitudinal stress sensor 3, a high-definition camera 4, a data acquisition circuit 5 and a computer 6, wherein the transverse stress sensor 2 and the longitudinal stress sensor 3 are arranged on the longitudinal and transverse surfaces of the rock stratum 1, the high-definition camera 4 is arranged in the rock stratum simulation and fixing system to shoot the deformation change of the simulated rock stratum 1 in the whole loading process in real time, and the high-definition camera 4, the transverse stress sensor 2 and the longitudinal stress sensor 3 are connected with the computer 6 through the data acquisition circuit 5.
The rock stratum simulation and fixing system comprises a fixed box body 7, a fixed support 8 and a movable pressing seat 9, wherein the fixed support 8 is rotatably connected to the inner rear side of the fixed box body 7 through a pin shaft 10 arranged along the left and right horizontal directions, a fixed square groove is formed in the front side of the fixed support 8, a fixed support groove with an arc-shaped cross section is formed in the rear side of the fixed support 8 along the left and right horizontal directions, and a support column 11 in abutting contact with the fixed support groove is arranged on the inner rear side wall of the fixed box body 7;
a movable square groove corresponding to the fixed square groove in the front and back direction is formed in the rear side of the movable pressing seat 9, guide grooves 12 are formed in the front and back direction of the left side wall and the right side wall in the fixed box 7, guide posts 13 extending into the guide grooves and sliding back and forth along the guide grooves 12 are arranged on two sides of the movable pressing seat 9, and a movable jacking groove with an arc-shaped section is formed in the left and right horizontal direction in the front side of the movable pressing seat 9;
the rock stratum 1 comprises a regulating rock stratum 14 and a three-layer testing rock stratum 15 which are arranged from top to bottom, the front end parts of the regulating rock stratum 14 and the testing rock stratum 15 are placed in the movable square groove, and the rear end parts of the regulating rock stratum 14 and the testing rock stratum 15 are placed in the fixed square groove.
The structural power simulation system comprises a transverse power simulation mechanism and a longitudinal power simulation mechanism; at least three groups of transverse dynamic simulation mechanisms are arranged along the front and back directions of the rock stratum 1,
each group of transverse power simulation mechanisms comprises a cushion block 16, two left pressing plates 17, two right pressing plates 38, a pulling plate 18, four prestressed steel strands 19 and a transverse oil cylinder 20, the left side of the transverse oil cylinder 20 is fixed on the right side of the fixed box 7, the right end of a piston rod of the transverse oil cylinder 20 is fixedly connected with the left side face of the pulling plate 18, the cushion block 16 is arranged between the right side of the two right pressing plates 38 and the right side wall of the fixed box 7, the two left pressing plates 17 are arranged on the left side of the rock stratum 1 and are arranged at intervals in the front and back, the two right pressing plates 38 are arranged on the right side of the rock stratum 1 and are arranged at intervals in the front and back, the left ends of the two prestressed steel strands 19 on the front side are respectively anchored with the upper portion and the lower portion of the left pressing plate 17 on the front side, the right ends of the two prestressed steel strands 19 on the front side are respectively anchored with the upper portion and the lower portion of the left pressing plate 17 on the back side after passing through the two right pressing plates 38 and the right side wall of the fixed box 7 and are anchored with the upper portion and the lower portion of the anchor block of the left side of the pulling plate 18 on the fixed box 7;
the longitudinal power simulation mechanism comprises a longitudinal oil cylinder 21 and a driving rod 22 which are arranged in the fixed box body 7, the rear side of the longitudinal oil cylinder 21 is fixedly connected to the inner wall of the front side of the fixed box body 7, the driving rod 22 is arranged along the left-right horizontal direction, the rear end of a piston rod of the longitudinal oil cylinder 21 is fixedly connected with the middle of the driving rod 22, and the rear side of the driving rod 22 is pressed in a movable pressing groove in the front side of the movable pressing seat 9.
The structural deformation control system comprises two front jacks 23, six middle jacks 24 and two rear jacks 25, the two front jacks 23 are respectively fixed on the top inner wall and the bottom inner wall of the front side of the fixed box body 7, and the two front jacks 23 are respectively positioned above and below the rock stratum 1 and are arranged up and down correspondingly; the three middle jacks 24 are fixed on the middle top inner wall of the fixed box body 7 at intervals in the left-right direction, the other three middle jacks 24 are fixed on the middle bottom inner wall of the fixed box body 7 at intervals in the left-right direction, the three middle jacks 24 on the upper portion and the three middle jacks 24 on the lower portion are respectively located above and below the rock stratum 1 and are in up-down one-to-one correspondence, the two rear jacks 25 are respectively fixed on the top inner wall and the bottom inner wall of the rear side of the fixed box body 7, and the two rear jacks 25 are respectively located above and below the rock stratum 1 and are in up-down correspondence.
The pressurizing system comprises a hydraulic control device 26, a hydraulic pump 27, a hydraulic oil tank 28 and a hydraulic flow divider 29, wherein an inlet of the hydraulic pump 27 is communicated with the hydraulic oil tank 28 through a first high-pressure oil pipe 30, an outlet of the hydraulic pump 27 is communicated with an inlet of the hydraulic flow divider 29 through a second high-pressure oil pipe 31, the hydraulic flow divider 29 is actually a high-pressure container, three outlets are arranged on the hydraulic flow divider 29, one outlet of the hydraulic flow divider 29 is connected with the longitudinal oil cylinder 21 through a third high-pressure oil pipe 32, a second outlet of the hydraulic flow divider 29 is connected with the transverse oil cylinder 20 through a fourth high-pressure oil pipe 33, a third outlet of the hydraulic flow divider 29 is connected with two front jacks 23, six middle jacks 24 and two rear jacks 25 of the structural deformation control system through a fifth high-pressure oil pipe 34, electronic valves 35 and pressure gauges 36 are arranged on the third high-pressure oil pipe 32, the fourth high-pressure oil pipe 33 and the fifth high-pressure oil pipe 34, and the first hydraulic control device 26 is respectively connected with the hydraulic pump 27, all the electronic valves 35 and the pressure gauges 36 through control lines 37.
The simulation method of the coal measure stratum stress distribution simulation device under the action of the multi-stage structure movement comprises the following steps:
(1) Preparation of the simulated rock formation 1 and embedding of the sensor: firstly, calculating Young modulus and thickness required by each testing rock stratum 15 and adjusting rock stratum 14 according to simulated rock stratum 1 parameters, wherein the testing rock stratum 15 is mainly used for simulating three coal-based strata with different lithology, and the number of layers can be increased or decreased according to needs, and the testing rock stratum 15 is formed by mixing cement, gypsum powder, quartz sand, clay and water according to different proportions and then laying in layers; the rock stratum 14 is mainly used for controlling the position of the surface in the folds and is also formed by paving cement, gypsum powder, quartz sand, clay and water after being mixed according to different proportions, and the Young modulus and the paving thickness of the rock stratum meet the requirements
When the fold middle and the fold top are always positioned in the regulated rock layer 14; in formula (II)>
And &>
Adjust the Young's modulus and thickness of the formation 14, respectively>
And &>
The average young's modulus and total thickness of the test formation 15, respectively;
then manufacturing a pouring mold according to the calculated size of the simulated rock stratum 1; preparing four mixtures with different expected strengths by using cement, gypsum powder, quartz sand, clay and water according to a certain proportion for later use; when pouring, firstly, pouring an adjusting rock stratum 14 at the bottom of the mold, after the adjusting rock stratum 14 is slightly solidified, sequentially pouring three layers of test rock strata 15 in sequence, simultaneously embedding a longitudinal stress sensor 3 and a transverse stress sensor 2, leading out a data acquisition circuit 5 to be connected with a computer 6, placing the simulated rock stratum 1 in a shade place, curing to the designed strength, and dismantling the mold;
(2) Installation of the simulated rock formation 1 and connection of the pressurization system: the fixed support 8 and the movable pressure seat 9 are respectively arranged at the rear side and the front side in the fixed box body 7 according to design, the pin shaft 10 is rotatably connected with the left side wall and the right side wall of the fixed box body 7, and meanwhile, a support column 11 arranged at the rear side wall in the fixed box body 7 is in jacking contact with the fixed support groove; the guide posts 13 on the two sides of the movable pressing seat 9 extend into and are arranged in the guide grooves 12 in a sliding manner, the prefabricated rock stratum 1 is placed in the fixed square groove of the fixed support 8 and the movable square groove of the movable pressing seat 9, a pressurizing system and an information acquisition, test and analysis system are installed and connected, and the transverse stress sensor 2 and the longitudinal stress sensor 3 are arranged in the test rock stratum 15 shown in the figures 1, 2 and 3; debugging lines, oil paths and oil pumps to ensure that all oil cylinders and jacks work normally;
(3) And constructing installation of a dynamic simulation system: placing two left pressing plates 17 on the left side of a simulated rock stratum 1, placing two right pressing plates 38 on the right side of the simulated rock stratum, penetrating a prestressed steel strand 19 through the left pressing plates 17, anchoring the prestressed steel strand 19 with the left pressing plates 17, fixing a pulling plate 18 on a piston rod of a transverse oil cylinder 20, penetrating the right end of the prestressed steel strand 19 through the pulling plate 18 and anchoring, and placing a cushion block 16 between the right sides of the two right pressing plates 38 and the right side wall of a fixed box body 7;
(4) And setting transverse pre-deformation on the rock stratum 1: in order to ensure that the required structural form can be well simulated in the experiment, firstly, the deformation control jack group is used for carrying out transverse deformation presetting, namely, firstly, a hydraulic pump 27 is operated by operating a hydraulic control device 26, the two front jacks 23, the two rear jacks 25 and the two middle jacks 24 positioned in the middle in the front-rear direction simultaneously load the middle part of the simulated rock stratum 1 so as to achieve the purpose of limiting the vertical displacement of the middle part of the rock stratum 1, and then the two middle jacks 24 positioned on the left side in the front-rear direction and the two middle jacks 24 positioned on the right side are started to apply pressure to the rock stratum 1 so that the rock stratum 1 is transversely corrugated;
(5) And transverse structure dynamic simulation: simultaneously starting three transverse oil cylinders 20 through a hydraulic control device 26 to perform tensioning loading on the prestressed steel strands 19, unloading all jacks in the step (4), acquiring change data of transverse stress through a transverse stress sensor 2 during tensioning, stopping tensioning when the buckling deformation is observed through a camera shooting picture according to the preset construction form in the step (4) and meeting the design requirement, anchoring the prestressed steel strands 19 on the right side of a right pressing plate 38 to enable the simulated rock stratum 1 to keep the current stress and deformation state, unloading the transverse oil cylinders 20, removing cushion blocks 16, shearing off redundant prestressed steel strands 19, and storing stress change data and video data;
(6) Longitudinal structure dynamic simulation: the method comprises the steps that a longitudinal oil cylinder 21 is opened through a hydraulic control device 26 to directly load a simulated rock stratum 1 subjected to transverse structural power, the longitudinal oil cylinder 21 drives a movable pressing seat 9 to move backwards through a driving rod 22 to press the rock stratum 1, two ends of a fixed support 8 are rotatably connected into a fixed box body 7 through a pin shaft 10, so that the simulated rock stratum 1 is easier to form a flexure structure in longitudinal structural power loading, longitudinal and transverse stress and flexure deformation changes are collected through a longitudinal stress sensor 3 and a transverse stress sensor 2 during longitudinal loading, the deformation process of the simulated rock stratum 1 is recorded through a camera, loading is continued until the rock stratum 1 is broken, and stress and deformation change data and video data are stored;
(7) Unloading each device and equipment after the experiment is finished;
(8) Pouring the simulated rock stratum 1 positioned between the test rock stratums 15 by using a pouring mould to perform the simulation process of the steps;
(9) The simulated rock formation 1 with the casting mold for casting the regulated rock formation 14 at the topmost part of the test rock formation 15 is subjected to the simulation process of the above steps.
Claims (6)
1. Coal measure stratum stress distribution analogue means under the effect of multi-phase structure motion, its characterized in that: the system comprises a rock stratum simulation and fixing system, a construction dynamic simulation system, a construction deformation control system, a pressurization system and an information acquisition, test and analysis system;
the rock stratum simulation and fixing system is internally provided with and fixed with a plurality of rock strata, the longitudinal direction of the rock stratum is assumed to be the front-back direction, the transverse direction is assumed to be the left-right direction, the structural power simulation system is arranged around the rock stratum and applies longitudinal force and transverse force to the rock stratum, the structural deformation control system is arranged at the top and the bottom in the rock stratum simulation and fixing system and is used for controlling the deformation of the rock stratum to enable the rock stratum to reach an expected structural form, and the pressurizing system adopts a hydraulic system to provide power for the structural power simulation system and the structural deformation control system; the information acquisition, test and analysis system comprises a transverse stress sensor, a longitudinal stress sensor, a high-definition camera, a data acquisition circuit and a computer, wherein the transverse stress sensor and the longitudinal stress sensor are arranged on the longitudinal and transverse surfaces of the rock stratum, the high-definition camera is arranged in the rock stratum simulation and fixing system and used for shooting the deformation change of the simulated rock stratum in the whole loading process in real time, and the high-definition camera, the transverse stress sensor and the longitudinal stress sensor are connected with the computer through the data acquisition circuit.
2. The device for simulating the stress distribution of a coal measure formation under the action of multi-stage tectonic movement according to claim 1, characterized in that: the rock stratum simulation and fixing system comprises a fixed box body, a fixed support and a movable pressing seat, wherein the fixed support is rotatably connected to the inner rear side of the fixed box body through a pin shaft arranged along the left and right horizontal directions;
the rear side of the movable pressing seat is provided with a movable square groove corresponding to the front and the rear of the fixed square groove, the left side wall and the right side wall in the fixed box body are provided with guide grooves along the front and rear directions, two sides of the movable pressing seat are provided with guide pillars which extend into and slide along the guide grooves in the front and rear directions, and the front side of the movable pressing seat is provided with a movable jacking groove with an arc-shaped section along the left and right horizontal directions;
the rock stratum comprises a regulating rock stratum and a plurality of testing rock strata which are arranged from top to bottom, the front end parts of the regulating rock stratum and the testing rock stratum are placed in the movable square groove, and the rear end parts of the regulating rock stratum and the testing rock stratum are placed in the fixed square groove.
3. The device for simulating the stress distribution of a coal measure formation under the action of multi-stage tectonic movement according to claim 2, characterized in that: the structure power simulation system comprises a transverse power simulation mechanism and a longitudinal power simulation mechanism; the transverse dynamic simulation mechanisms are at least provided with three groups along the front and back directions of the rock stratum,
each group of transverse power simulation mechanisms comprises a cushion block, two left pressing plates, two right pressing plates, a pulling plate, four prestressed steel strands and a transverse oil cylinder, wherein the left side of the transverse oil cylinder is fixed on the right side of a fixed box body, the right end of a piston rod of the transverse oil cylinder is fixedly connected with the left side surface of the pulling plate, the cushion block is arranged between the right sides of the two right pressing plates and the right side wall of the fixed box body, the two left pressing plates are arranged on the left side of a rock stratum and are arranged at intervals from front to back, the left ends of the two prestressed steel strands on the front side are respectively anchored with the upper part and the lower part of one left pressing plate on the front side, the right ends of the two prestressed steel strands on the front side are anchored with the upper part and the lower part of the front side of the pulling plate after penetrating through the two right pressing plates and the right side wall of the fixed box body, the left ends of the two prestressed steel strands on the rear side are respectively anchored with the upper part and the lower part of the left pressing plate on the rear side of the fixed box body after penetrating through the cushion block and the right side wall of the fixed box body;
the longitudinal power simulation mechanism comprises a longitudinal oil cylinder and a driving rod which are arranged in the fixed box body, the rear side of the longitudinal oil cylinder is fixedly connected to the inner wall of the front side of the fixed box body, the driving rod is arranged in the left-right horizontal direction, the rear end of a piston rod of the longitudinal oil cylinder is fixedly connected with the middle of the driving rod, and the rear side of the driving rod is jacked in a movable jacking groove in the front side of the movable pressure seat.
4. The device for simulating the stress distribution of a coal measure formation under the action of multi-stage tectonic movement according to claim 3, characterized in that: the structural deformation control system comprises two front jacks, six middle jacks and two rear jacks, the two front jacks are respectively fixed on the top inner wall and the bottom inner wall of the front side of the fixed box body, and the two front jacks are respectively positioned above and below the rock stratum and are arranged in an up-and-down corresponding mode; the three middle jacks are fixed on the middle top inner wall of the fixed box body at intervals in the left-right direction, the other three middle jacks are fixed on the middle bottom inner wall of the fixed box body at intervals in the left-right direction, the three middle jacks on the upper portion and the three middle jacks on the lower portion are respectively located above and below the rock stratum and vertically correspond to each other one by one, the two rear jacks are respectively fixed on the top inner wall and the bottom inner wall of the rear side of the fixed box body, and the two rear jacks are respectively located above and below the rock stratum and vertically correspond to each other.
5. The device for simulating the stress distribution of a coal measure formation under the action of multi-stage tectonic movement according to claim 4, wherein: the pressurizing system comprises a hydraulic control device, a hydraulic pump, a hydraulic oil tank and a hydraulic flow divider, wherein an inlet of the hydraulic pump is communicated with the hydraulic oil tank through a first high-pressure oil pipe, an outlet of the hydraulic pump is communicated with an inlet of the hydraulic flow divider through a second high-pressure oil pipe, three outlets are formed in the hydraulic flow divider, one outlet of the hydraulic flow divider is connected with the longitudinal oil cylinder through a third high-pressure oil pipe, a second outlet of the hydraulic flow divider is connected with the transverse oil cylinder through a fourth high-pressure oil pipe, a third outlet of the hydraulic flow divider is connected with two front jacks, six middle jacks and two rear jacks through a fifth high-pressure oil pipe, electronic valves and pressure gauges are arranged on the third high-pressure oil pipe, the fourth high-pressure oil pipe and the fifth high-pressure oil pipe, and the first hydraulic control device is connected with the hydraulic pump, all the electronic valves and the pressure gauges through control lines.
6. The simulation method of the coal measure formation stress distribution simulation device under the action of the multi-stage tectonic movement according to claim 5, characterized in that: the method comprises the following steps:
(1) Preparation of simulated rock formation and embedding of sensor
Firstly, calculating the Young's modulus required by each tested rock stratum and adjusting the rock stratum according to the simulated rock stratum parametersThe test rock stratum is formed by mixing cement, gypsum powder, quartz sand, clay and water according to different proportions and then laying in layers; the rock stratum is mainly used for controlling the position of the dough surface in the folds and is also formed by paving cement, gypsum powder, quartz sand, clay and water after being mixed according to different proportions, and the Young modulus and the paving thickness of the rock stratum meet the requirements
When the rock is in the adjusting stratum, the fold middle surface and the fold middle surface are always positioned in the adjusting stratum; in the formula
And
to adjust the young's modulus and thickness of the formation,
and
the average young's modulus and total thickness of the test rock formation, respectively;
then manufacturing a pouring mold according to the calculated size of the simulated rock stratum; preparing four mixtures with different expected strengths by using cement, gypsum powder, quartz sand, clay and water according to a certain proportion for later use; when pouring, firstly, pouring an adjusting rock stratum at the bottom of the mold, after the adjusting rock stratum is slightly solidified, sequentially pouring three layers of test rock strata in sequence, simultaneously embedding a longitudinal stress sensor and a transverse stress sensor, leading out a data acquisition circuit to be connected with a computer, placing the simulated rock stratum in a shade place, curing to the designed strength, and dismantling the mold;
(2) Installation of simulated rock formation and connection of pressurized system
The fixed support and the movable pressing seat are respectively arranged on the rear side and the front side in the fixed box body according to design, the pin shaft is rotatably connected to the left side wall and the right side wall of the fixed box body, and meanwhile, a supporting column arranged on the inner rear side wall of the fixed box body is in pressure contact with the top of the fixed supporting groove; the guide posts on the two sides of the movable pressing seat extend into and are arranged in the guide grooves in a sliding mode, the prefabricated rock stratum is placed in the fixed square groove of the fixed support and the movable square groove of the movable pressing seat, the pressurizing system and the information acquisition testing and analyzing system are installed and connected, and the transverse stress sensor and the longitudinal stress sensor are arranged in the tested rock stratum; debugging lines, oil paths and oil pumps to ensure that all oil cylinders and jacks work normally;
(3) And mounting of the structural dynamic simulation system
Placing two left pressing plates on the left side of the simulated rock stratum, placing two right pressing plates on the right side of the simulated rock stratum, penetrating the prestressed steel strand through the left pressing plates and anchoring the prestressed steel strand with the left pressing plates, fixing the pulling plate on a piston rod of a transverse oil cylinder, penetrating the right end of the prestressed steel strand through the pulling plate and anchoring, and placing a cushion block between the right sides of the two right pressing plates and the right side wall of the fixed box body;
(4) Setting transverse predeformation on the rock stratum
In order to ensure that the required structural form can be well simulated in the experiment, firstly, the deformation control jack set is used for carrying out transverse deformation presetting, namely, firstly, a hydraulic control device is operated to enable a hydraulic pump to work, two front jacks, two rear jacks and two middle jacks positioned in the middle in the front and rear direction simultaneously load the middle part of a simulated rock stratum so as to achieve the purpose of limiting the vertical displacement of the middle part of the rock stratum, and then the two middle jacks positioned on the left side in the front and rear direction and the two middle jacks on the right side are started to apply pressure to the rock stratum so as to enable the rock stratum to form a fold shape in the transverse direction;
(5) Lateral structural dynamic simulation
Simultaneously starting three transverse oil cylinders through a hydraulic control device to carry out tensioning loading on the prestressed steel strands, unloading all jacks in the step (4), collecting change data of transverse stress through a transverse stress sensor while tensioning, stopping tensioning when the buckling deformation is observed through a camera shooting picture according to the preset structural form in the step (4) and meeting the design requirement, anchoring the prestressed steel strands on the right side of a right pressing plate to enable a simulated rock stratum to keep the current stress and deformation state, unloading the transverse oil cylinders, removing a cushion block, shearing off redundant prestressed steel strands, and storing stress change data and video data;
(6) Longitudinal structural dynamic simulation
The method comprises the following steps that a longitudinal oil cylinder is started through a hydraulic control device to directly load a simulated rock stratum subjected to transverse construction power, the longitudinal oil cylinder drives a movable pressing seat to move backwards through a driving rod to press the rock stratum, two ends of a fixed support are rotatably connected into a fixed box body through a pin shaft, so that the rock stratum is more easily simulated in the longitudinal construction power loading to form a flexure structure, longitudinal and transverse stress and flexure deformation changes are collected through a longitudinal stress sensor and a transverse stress sensor during longitudinal loading, the deformation process of the simulated rock stratum is recorded through a camera, loading is continued until the rock stratum is broken, and stress and deformation change data and video data are stored;
(7) Unloading each device and equipment after the experiment is finished;
(8) Pouring the simulated rock stratum between the test rock stratums by using a pouring mould to perform the simulation process of the steps;
(9) And (4) casting the simulated rock stratum with the adjusting rock stratum at the topmost part of the test rock stratum by using the casting mold, and performing the simulation process of the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572015.9A CN107219128B (en) | 2017-07-13 | 2017-07-13 | Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710572015.9A CN107219128B (en) | 2017-07-13 | 2017-07-13 | Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107219128A CN107219128A (en) | 2017-09-29 |
| CN107219128B true CN107219128B (en) | 2023-03-24 |
Family
ID=59952161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710572015.9A Active CN107219128B (en) | 2017-07-13 | 2017-07-13 | Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107219128B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108106762B (en) * | 2017-12-18 | 2020-01-14 | 中国矿业大学(北京) | 3D printing photoelastic material and method for simulating loaded flexure stress distribution |
| CN109397729A (en) * | 2018-11-23 | 2019-03-01 | 苏州市科林除尘设备有限公司 | Multi-column wound-type hydraulic machine |
| CN110046438B (en) * | 2019-04-20 | 2022-11-04 | 石家庄铁道大学 | Analysis system for stress and displacement of orthotropic surrounding rock of deep-buried non-circular tunnel |
| CN112700704B (en) * | 2020-12-02 | 2023-10-31 | 中国石油天然气股份有限公司 | Knee fold structure simulation method and device |
| CN112700705B (en) * | 2020-12-02 | 2023-10-27 | 中国石油天然气股份有限公司 | Knee fold structure simulation system and method |
| CN116696584B (en) * | 2023-08-07 | 2023-10-13 | 康硕(德阳)智能制造有限公司 | Engine cylinder cover and casting method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931674A (en) * | 2015-05-22 | 2015-09-23 | 山东科技大学 | Heavy-pitch ultra-thick coalbed fully-mechanized caving mining three-dimensional similar material simulation test bed |
| CN205317773U (en) * | 2015-12-31 | 2016-06-15 | 西安科技大学 | Plane model support overlying rock load loading device |
| CN206158717U (en) * | 2016-10-14 | 2017-05-10 | 河南理工大学 | Coal seam gas well hydraulic fracturing process crustal stress changes analogue means |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614497B (en) * | 2015-03-09 | 2016-04-20 | 中国矿业大学 | True triaxial stream pressure fracturing, slot, seepage flow, gas drive integrated experimental system |
-
2017
- 2017-07-13 CN CN201710572015.9A patent/CN107219128B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931674A (en) * | 2015-05-22 | 2015-09-23 | 山东科技大学 | Heavy-pitch ultra-thick coalbed fully-mechanized caving mining three-dimensional similar material simulation test bed |
| CN205317773U (en) * | 2015-12-31 | 2016-06-15 | 西安科技大学 | Plane model support overlying rock load loading device |
| CN206158717U (en) * | 2016-10-14 | 2017-05-10 | 河南理工大学 | Coal seam gas well hydraulic fracturing process crustal stress changes analogue means |
Non-Patent Citations (1)
| Title |
|---|
| 煤矿井下地质构造与地应力的关系;王胜本等;《煤炭学报》;20080715(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107219128A (en) | 2017-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107219128B (en) | Device and method for simulating stress distribution of coal measure strata under action of multi-stage structure movement | |
| CN108072570B (en) | Device and method for testing soil pressure of anchor plate retaining wall under different displacement modes | |
| CN108061687B (en) | Geotechnical engineering simulation test platform for researching potential failure surface | |
| CN108226447B (en) | Three-dimensional simulation test device and test method for underground coal mining surface movement | |
| CN110346216B (en) | Coal rock triaxial loading test device and method under condition of simulated tunneling disturbance | |
| CN108732024B (en) | Test system and test method for simulating water inrush of bottom plate under different ground stress conditions | |
| CN101308126B (en) | Offshore mining top board seepage flow sudden inflow test method and device | |
| CN101377479B (en) | Stope mine pressing three-dimensional physical simulation test stand | |
| WO2018006585A1 (en) | Multi-functional true triaxial rock drilling test system and method | |
| CN108828195B (en) | Indoor test method for simulating upward return of post-grouting slurry at pile end | |
| CN107354961B (en) | Variable-rigidity pre-stressed anchor-pull type retaining wall soil arch effect test model device and method | |
| CN108760370B (en) | Multi-angle inclined rock stratum roadway support similarity simulation test device and test method | |
| CN114199686B (en) | Model test device and method for operating highway tunnel lining disease evolution law | |
| CN211505504U (en) | Test device for simulating tunnel crossing water-rich fault gushing water | |
| CN110006764B (en) | Dynamic traffic load simulation device and method for rock-soil and underground engineering model test | |
| CN107727424B (en) | Geomechanical model experimental device and method for stability of bedding rock slope | |
| CN211602719U (en) | Stope mine pressure three-dimensional physical simulation test platform of multi-functional top bottom plate gushing water | |
| CN206945390U (en) | A kind of automatic compact device for analog simulation experiment | |
| CN109975117B (en) | Push pipe experiment box and experiment method | |
| CN108414347B (en) | Multifunctional test system capable of simulating deep fault formation and crack development | |
| CN110940571B (en) | Test device for simulating dynamic soil arch effect of shed frame structure | |
| CN112881166B (en) | Device and method for testing stability of foundation in mining overall process and mining subsidence area | |
| CN111081110A (en) | Mechanical behavior characteristic simulation test device and test method for cross-fault tunnel roadway under different burial depths and different structural stresses | |
| CN103061774A (en) | Shield tunnel construction environment simulation unit | |
| CN110441159A (en) | The simulation test device and method of borehole wall bearer properties under hydraulic coupling action |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |